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Technological Properties and Application of Analcime-Bearing Rocks of the Timan Region

地学前缘 2009年第S1期16卷 159-160页

作者： Dmitry Shushkov institute of geology komi sc ub of ras

Analcime-bearing rocks from Carboniferous and Permian sediments occupy a vast area in the Timan (komi Republic,russian Federation)—about 150.000 km^*** are represented by siltstones and *** analcime-bearing rocks have the following mineral composition(%):clay minerals (50-70),quartz(10-30),analcime(1-30),feldspars (2-10),carbonates(2-5),and pyroclastic material.

关键词： analcime zeolites ion-exchange physicochemical properties adsorbtion concentration

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Geomaterials on the Basis of Analcime-Bearing Rocks

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Geomaterials 2011年第2期1卷 33-40页

作者： Dmitry A. Shushkov Olga B. Kotova Boris A. Goldin establishment of russian academy of sciences institute of geology of komi sc ub ras Syktyvkar

Analcime-bearing rocks (komi Republic, Russia) are perspective raw for geological materials. The article represents possibilities of their application for water purification, as raw for ceramic industry and poor ore f... 详细信息

关键词： Analcime-Bearing Rocks Water Purification Ion Exchange Ceramics Aluminum Extraction

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Ecological and habitat ranges of orchids in the northernmost regions of their distribution areas:A case study from Ural Mountains,Russia

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Plant Diversity 2023年第2期45卷 211-218页

作者： Irina A.Kirillova Yuriy A.Dubrovskiy Svetlana V.Degteva Alexander B.Novakovskiy institute of Biology of komi science Centre of the Ural Branch of the russian academy of sciences 28 Kommunisticheskaya St.167982SyktyvkarKomi RepublicRussia

The Orchidaceae,which is one of the most interesting families of angiosperms,contains a large number of rare *** their acknowledged importance,little attention has been paid to the study of orchids distributed in northern *** this study,we determined the syntaxonomical diversity and ecological parameters of orchid habitats in two of Europe's largest protected areas,the Pechoro-Ilychsky Reserve and the Yugyd Va National Park(northeastern European Russia),and then compared our findings to those in other parts of orchid distribution *** this purpose,we studied 345 descriptions of plant communities(releves) containing species from Orchidaceae and defined habitat parameters using Ellenberg indicator values with the community weight mean approach,nonmetric multidimensional scaling(NMS),and relative niche *** found that orchids were distributed in eight habitat types and 97 plant *** largest number of orchid species is found in forest *** of the orchid species under study occur in the mires and rock habitats with open *** orchids consistently occur in areas disturbed by human *** addition,our study indicates that the main drivers of orchid distribution across the vegetation types are light and soil *** analysis of the ecological parameters of orchid habitats indicates that some orchid species can be classified as habitat specialists that are confined to a relatively narrow ecological niche in the Urals(e.g.,Goodyera repens,Cypripedium guttatum and Dactylorhiza maculata).Several other species(*** cordata and Dactylorhiza fuchsia) grow under diverse ecological parameters.

关键词： Orchidaceae Plant communities Nature protected areas Community weight mean Illumination Moisture

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Synthesis of Al2O3-SiO2-MgO ceramics with hierarchical porous structure

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Journal of Advanced Ceramics 2017年第1期6卷 92-页

作者： Elena F.KRIVOSHAPKINA Pavel V.KRIVOSHAPKIN Aleksey A.VEDYAGIN institute of Chemistry of komi sc ub ras Syktyvkar 167982 Russia ITMO University St.Petersburg 197101 Russia Boreskov institute of Catalysis SB ras Novosibirsk 630090 Russia National Research Tomsk Polytechnic University Tomsk 634050 Russia

A series of asymmetric cordierite ceramics with hierarchical porous structure were prepared and *** macroporous support was obtained from natural raw materials (bauxite,silica sand,kaolinite,talc,and alumina) via ceramic *** prepared ceramic discs were characterized by a narrow pore size *** average pore size was about 9.5 μm,and the open porosity was estimated to be 30％.Coating the discs with micro/mesoporous cordierite layer was performed using the sol-gel ***-component sols were obtained from organic or inorganic *** gels were calcined at 1200 ℃ to form the cordierite *** nature of precursor was found to affect the pore volume *** pore volume distribution was observed when organic precursors were *** key factor to control the parameters of final material was the drying *** drying of the gels has allowed us to increase the surface area in two orders of magnitude comparing with conventional drying procedure.

关键词： sol-gel method aerogels cordierite Al2O3-SiO2-MgO hierarchical porous structure

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